I replied to your other thread about this machine in the pictures section.
I have almost the same machine as yours, mine is the next model up, I think. 158.17740. Yours was manufactured in 1973, mine in 1974. You know, my machine is way older than I am, and I still love it. I just took the plunge last month and bought a new one, and I wouldn't even look at anything other than a kenmore, I had such great luck with the previous one. It just died on me one day and I couldn't bear to get rid of it so I snuck it to the repair shop and had it fixed, even though I just blew 500 bucks on a new machine, lol! My bf is still mad at me for that.

Anyway, I know it's not EXACTLY the same model, but I think it's pretty similar, did you get a bunch of different cams with yours?
If you want, I can see if I can find the english version of my manual (I mostly refer to the french one) and make photocopies to send you. Let me know!